Nature's Sunshine Stomach Comfort provides natural ingredients to help nutritionally support smooth, comfortable digestion. Stomach Comfort contains calcium carbonate which helps buffer acidity. Alginic acid , which converts to sodium alginate, helps to maintain the mucous lining of the esophagus. Slippery Elm bark coats and soothes the digestive tract while ginger root, papaya fruit and licorice root work together to aid digestion.